Enqueuing Library limitation

Hi:
I am using Volumio 1.55 with a PI2 and an IQaudio DAC+ being fed from a OpenMediaVault NAS built with a Udoo-Quad. Having fun.
For the most part things are working well
But whenever I try to enqueue all songs from a large genre set (such as rock which has a few thousand entries) the enqueue function typically tops out at 250 selections in the playlist.
Has anyone else encountered this or is it just me?

Your input would be appreciated.
Regards,
Dennis